The following function compares a value against an array and goes through the elements of the array until finds an element that is smaller than the comparison value. As a result it should return the index of that element where condition was met. In this example it should return the index of 4 (with value of 5). I store this index in lowestNumberIndex but can only access it within the scope of last if() function. How can I access it outside the for loop? Notice that I have initiated the object outside of the for loop.
function findLowerIndex () {
let firstArray = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
let compareValue = [6];
var lowerNumber = null;
var lowestNumberIndex = null;
for (i=firstArray.length-1; i>0; i--) {
lowerNumber = firstArray[i];
if (lowerNumber < compareValue) {
lowestNumberIndex = i;
return;
}
}
}
You could take the index for looping and as result. For the comparing value use the value without wrapping it in an array.
function findLowerIndex() {
const
firstArray = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
compareValue = 6;
let index = firstArray.length;
while (index--) {
if (firstArray[index] < compareValue) break;
}
// use the found index
return index;
}
console.log(findLowerIndex());So thanks to all the comments and solutions I figured what the problem was. The problem was that I did not know using return jumps you out of the whole function. Using break instead worked!